Touch Sensor and Method of Forming a Touch Sensor

1. A touch sensor comprising: a substrate having a substrate surface; and at least one first electrode set comprising a plurality of electrodes over the substrate surface and arranged in a row along a first direction, said electrodes comprising first material being electrically conductive and light transmissive, and at least one connection element coupling a pair of adjacent ones of the plurality of electrodes, said at least one connection element comprising a second material having a lower specific electrical resistance than the first material, said at least one connection element comprising a first portion, a second portion, and a third portion, the third portion coupling the first portion and the second portion, the first portion having a projection onto the substrate surface along a surface normal to the substrate surface being within a projection of a first one of the pair of electrodes coupled by the at least one connection element onto the substrate surface along the surface normal, the second portion having a projection onto the substrate surface along the surface normal being within a projection of a second one of the pair of electrodes coupled by the connection element onto the substrate surface along the surface normal, a dimension of the third portion in a second direction perpendicular to the first direction and the surface normal being smaller than a dimension of the first portion in the second direction and a dimension of the second portion in the second direction, with each of the first, second, and third portions having a rectangular shape, wherein a longer side of the first portion and a longer side of the second portion extend in the second direction, and wherein a longer side of the third portion extends in the first direction.

2. A touch sensor as in claim 1 , wherein a dimension of the third portion in the first direction is greater than a dimension of the first portion in the first direction and a dimension of the second portion in the first direction.

3. A touch sensor as in claim 1 , wherein at least one of a dimension of the first portion in the first direction, a dimension of the second portion in the first direction, and a dimension of the third portion in the second direction are less than or equal to 15 μm.

4. A touch sensor as in claim 1 , wherein each of the electrodes of the at least one first set thereof has a rhombus shape, a first diagonal of the rhombus extending in the first direction, a second diagonal of the rhombus extending in the second direction.

5. A touch sensor as in claim 1 , further comprising at least one second electrode set comprising a plurality of electrodes arranged in a row along the second direction, and being transparent and formed from the first material, and at least one connection element coupling a pair of adjacent ones of the plurality of electrodes.

6. A touch sensor as in claim 5 , wherein portions of the electrodes of the at least one second electrode set are formed on a same surface as portions of the electrodes of the at least one first electrode set, and each of the third portions of the connection elements of the at least one first electrode set is at least partially located above or below one of the connection elements of the at least one second electrode set and separated therefrom by an insulating layer.

7. A touch sensor as in claim 6 , wherein the at least one connection element of the at least one second electrode set are formed from the first material, and a dimension of the at least one connection element of the at least one second electrode set in the first direction is greater than the dimension of the third portions of the at least one connection element of the at least one first electrode set in the second direction.

8. A touch sensor as in claim 5 , wherein at least one electrically insulating layer is formed between a first surface on which the electrodes of the at least one first electrode set are formed and a second surface on which the electrodes of the at least one electrode set are formed.

9. A touch sensor as in claim 1 , wherein pairs of adjacent electrodes of the at least one first electrode set are coupled by transparent electrode connector portions formed from the first material in addition to being coupled by the at least one connection element of the respective first electrode set.

10. A touch sensor as in claim 1 , wherein the at least one connection element of the at least one second electrode set is formed from the second material and comprises a first portion, a second portion, and a third portion, the third portion coupling the first portion and the second portion; wherein a projection of the first portion onto the substrate surface along a surface normal to the substrate surface is within a projection of a first one of the pair of electrodes coupled by the at least one connection element onto the substrate surface along the surface normal; wherein a projection of the second portion onto the substrate surface along the surface normal is within a projection of the second one of the pair of electrodes coupled by the at least one connection element onto the substrate surface along the surface normal; and wherein a dimension of the third portion in the first direction is smaller than a dimension of the first portion in the first direction and a dimension of the second portion in the first direction.

11. A touch sensor according to claim 10 , wherein pairs of adjacent electrodes of the at least one second electrode set are coupled by transparent electrode connector portions formed from the first material in addition to being coupled by the at least one connection element.

12. A touch sensor according to claim 5 , further comprising a control circuit, and a plurality of electrically conductive lines comprising the second material, each of the electrically conductive lines coupling the control circuit and at least one of the at least one first electrode set and the at least one the second electrode set.

13. A touch sensor according to claim 12 , wherein each of the electrically conductive lines comprises a layer of the first material and a layer of the second material.

14. A touch sensor comprising: a substrate having a substrate surface; and at least one first electrode set comprising a plurality of electrodes over the substrate surface and arranged in a row along a first direction, and at least one connection element coupling a pair of adjacent ones of the plurality of electrodes, said at least one connection element comprising a first portion, a second portion, and a third portion, the third portion coupling the first portion and the second portion, the first portion having a projection onto the substrate surface being within a projection of a first one of the pair of electrodes coupled by the at least one connection element onto the substrate surface, the second portion having a projection onto the substrate surface being within a projection of the second one of a pair of electrodes coupled by the connection element onto the substrate surface, a dimension of the third portion in a second direction being smaller than a dimension of the first portion in the second direction and a dimension of the second portion in the second direction, with each of the first, second, and third portions having a rectangular shape, wherein a longer side of the first portion and a longer side of the second portion extend in the second direction, and wherein a longer side of the third portion extends in the first direction.

15. A touch sensor as in claim 14 , wherein a dimension of the third portion in the first direction is greater than a dimension of the first portion in the first direction and a dimension of the second portion in the first direction.

16. A touch sensor as in claim 14 , wherein at least one of a dimension of the first portion in the first direction, a dimension of the second portion in the first direction, and a dimension of the third portion in the second direction are less than or equal to 15 μm.

17. A touch sensor as in claim 14 , wherein each of the electrodes of the at least one first set thereof has a rhombus shape, a first diagonal of the rhombus extending in the first direction, a second diagonal of the rhombus extending in the second direction.

18. A touch sensor as in claim 14 , further comprising at least one second electrode set comprising a plurality of electrodes arranged in a row along the second direction, and being transparent and formed from the first material, and at least one connection element coupling a pair of adjacent ones of the plurality of electrodes.

19. A method of forming a touch sensor, comprising: providing a substrate having a substrate surface; and forming at leas one first electrode set by at least forming a first of plurality of electrodes over the substrate surface, the electrodes being arranged in a row along a first direction, the electrodes comprising a first material being electrically conductive and light transmissive, forming at least one connection element coupling a pair of adjacent ones of the plurality of electrodes, the at least one element comprising a second material having a lower specific electric resistance than the first material, the at least one connection element comprising a first portion, a second portion, and a third portion, the third portion coupling the first portion and the second position, a projection of the first portion onto the substrate surface along a surface normal to the substrate surface being within a projection of a first one of the pair of electrodes electrically connected by the connection element onto the substrate surface along the surface normal, a projection of the second portion onto the substrate surface along the surface normal being within a projection of a second one of the pair of electrodes connected by the connection element onto the substrate surface along the surface normal, a dimension of the third portion in a second direction perpendicular to the first direction and the surface normal being smaller than a dimension of the first portion in the second direction and a dimension of the second portion in the second direction, with each of the first, second, and third portions having-a rectangular shape, wherein a longer side of the first portion and a longer side of the second portion extend in the second direction, and wherein a longer side of the third portion extends in the first direction.

20. A method as in claim 19 , wherein a dimension of the third portion in the first direction is greater than a dimension of the first portion in the first direction and a dimension of the second portion in the first direction.

21. A method as in claim 19 , wherein at least one of a dimension of the first portion in the first direction, a dimension of the second portion in the first direction, and a dimension of the third portion in the second direction are less than or equal to 15 μm.

22. A method as in claim 19 , wherein each of the electrodes of the at least one first set thereof has a rhombus shape, a first diagonal of the rhombus extending in the first direction, a second diagonal of the rhombus extending in the second direction.